Woven textile fabrics



June 11, 1957 D. w. SHIMWELL 2,795,244

WOVEN TEXTILE FABRICS Original Fil d Aug. 2, i954 .Zzpventon 512/6122 weL6 WOVEN TEXTILE FABRICS Derrick W. Shimwell, Ballamoar Castle, Jar-by,isle-of- Man, assignor to Weaving Research & Textile Commission AgentsLimited, Jurby, lsle of-Man, a British company Original applicationAugust 2, 1954, Serial No. 447,282. Divided and this application January14, 1955, Serial N 0. 481,936

2 Claims. (Cl. 139-383) This application is a division of my copendingapplication Serial No. 447,282, filed August 2, 1954.

In the production of woven textile fabrics in looms using stationaryweft supplies and arms, needles or other devices for transferring theWeft into the warp shed, and where only a single weft thread is laid inthe clothat each pick, it has been found necessary to turn-in the weftat the end of each or of each alternate pick in order to form the clothselvedge. One method gives 100% and the other 50% more weft in theselvedge, but although as a result the selvedges are more robust andbetter for sewing together, as for example when two selvedges of thefabric are sewn together for the manufacture of bags, the weavingprocess is made more difficult, the cloth is diflicult to roll up andthere are disadvantages in finishing treatments. This is particularlythe case where the yarns consist of certain bast fibres, such as jute,and long leaf fibres such as sisal. Due to the hardness of these fibres,the selvedges would be liable to split during calendering and likeprocessing.

The object of the present invention is to provide an improved woventextile fabric having more weft in the selvedge than in the body of thecloth, which results in more robust selvedges, but without thedisadvantages before referred to of the usual fabrics woven withthickened selvedges.

The invention comprises a woven fabric as aforesaid in which the weftthreads inserted in alternation from opposite sides of the fabric arelooped back in the opposite selvedge, so producing a U form of weft, oneend of each loop having a turned back end at the selvedge, the loopedportions of the weft threads inserted from one side of the fabricpassing around the turned back ends of the other weft threads, and theplain ends of the latter (that is the ends without turned back portions)coming between adjacent looped portions, whilst the looped portions ofthe weft threads inserted from the other side of the fabric pass roundthe plain ends of the other weft threads, the turned back ends of thelatter coming between adjacent loops.

The invention further comprises a woven fabric as aforesaid in which inthe main body of the fabric, the warp threads are shed after each weftpick, whilst in the selvedge the warp threads are shed after eachalternate weft pick, the turned back ends being bound in the fabric inthe same warp shed as the weft ends to which they are attached.

In application, Serial No. 447,282 filed August 2, 1954 is shown anddescribed a weaving loom for producing fabn'cs, one of such fabricsbeing disclosed herein.

2,795,244 Patented June ll, 1957 The accompanying drawing shows ourimproved fabric which has 25% more weft in the selvedges than in themain body of the fabric. a indicates weft and b warp threads. The latterare shown only at and towards the selvedges.

It will be noted that each weft thread a is of U form, being looped backat f in the opposite selvedge to that containing the ends of the loop.One end h of each loop has a turned back length of yarn g which is boundin the fabric in the same warp shed as the end It. It will be noted thatat the left hand selvedge, the weft ends h with the turned back portionsg come within the looped portion f of weft threads, whilst at the righthand selvedge, the plain ends i of the weft threads come within thelooped portions 1. The plain ends 1' of weft threads at the left handselvedge come between adjacent looped portions 1; the ends it withturned back portions g at the right hand selvedge come between adjacentlooped portions f. The four Warp threads nearest to each selvedge areshed or crossed over at alternate weft picks but the other warp threadsare shed or crossed over after each weft pick. As before stated theturned back end portions g are bound in the fabric in the same warp shedas the ends I: to which they are attached.

The fabric may be produced in the loom described and claimed inmycopending application, Serial No. 447,282.

What I claim is:

1. A Woven textile fabric including warp threads and U-shaped weftthreads inserted alternately from opposite sides of the fabric, eachweft thread having a turned back end located in the selvedge with theturned back ends of the threads inserted from one side of the fabricbeing located within the loops of the weft threads inserted from theopposite side of the fabric and the turned back ends of the weft threadsinserted from said opposite side being located between the adjacentloops of the threads inserted from said one side.

2. A woven fabric including warp threads and weft threads, the Weftthreads being inserted alternately from opposite sides of the fabric andlooped back into the selvedge thereby producing a U-form of weft, eachweft thread having a plain end and a turned back end, with the turnedback end located in the selvedge, the looped portions of the weftthreads inserted from one side of the fabric passing around the turnedback ends of the weft threads inserted, from the oher side of thefabric, with the plain ends of the later being located between adjacentlooped portions, while the looped portions of the weft threads insertedfrom the other side of the fabric pass around the plain ends of theother weft threads and the turned back ends of the latter weft threadsbeing located between adjacent loops.

References Cited in the file of this patent UNITED STATES PATENTS361,360 Hunt Apr. 19, 1887 1,948,051 Rossmann Feb. 20, 1934 2,027,806Bird Jan. 14, 1936 2,034,487 Rossmann Mar. 17, 1936 FOREIGN PATENTS677,255 Germany June 22, 1939

